https://bugs.kde.org/show_bug.cgi?id=494665
Bug ID: 494665
Summary: Desktop freezes when closing file picker dialog used
by KDE apps after GTK file picker was used in the
current session
Classification: Plasma
Product: kwin
Version: 6.2.0
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: yule2...@live.com
Target Milestone: ---
SUMMARY
The entire desktop would freeze for a couple of seconds when you close a KDE
Frameworks-based file dialog, only if you've previously opened a GTK-based file
dialog in the current session.
STEPS TO REPRODUCE
1. Open any app that does not support the DE-native file picker dialog through
xdg-desktop-portal-kde (in my case, it was Audacity)
2. Go to File > Open... to open the file picker for that app and double-click a
file to open it
3. Open another app that supports the DE-native file picker dialog (e.g., any
KDE app or Firefox)
4. Open the file dialog for that app (e.g., by pressing Ctrl+O) and close it
OBSERVED RESULT
The entire screen, including the mouse cursor, would lock up for about a
second. The length of subsequent freezes would get progressively worse if I use
the GTK file dialog multiple times.
EXPECTED RESULT
No freezes
SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 6.2.0
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.3
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 6750 XT
Graphics Driver: Mesa (AMDGPU)
ADDITIONAL INFORMATION
When I repeatedly press a key during the freeze, I get this message in
journalctl:
kwin_wayland_wrapper[253591]: Key repeat discarded, Wayland compositor doesn't
seem to be processing events fast enough!
I was running Audacity 3.6.4 when I realized what triggered this bug, and the
app only runs on Xwayland as of that version. The earliest version of Plasma I
remember seeing this happen was 6.1.
The freezing would stop when I log out and log back in. It would also stop
after I run `pkill -ABRT -f 'kwin_wayland.*socket'` to force the compositor to
restart without ending my session.
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